The Marik Militias use a color scheme first seen in 2620--purple with red accents on the right side and blue on the left.
Per FM:Free Worlds Legue, page 55.
Wraith, CB: Miniatures Rules (p 21)
Each 'Mech displays the Marik Militia crest - a stylized Marik Eagle on a red and blue background - on its left arm or weapons pod. The insignia of the Second Militia shows a hand of five cards, four of which are aces. The central and most prominent card is a joker. Per FM: Free Worlds League, pages 53 and 55.